diff --git a/composer.json b/composer.json
index e0374a1..5693afe 100644
--- a/composer.json
+++ b/composer.json
@@ -7,6 +7,7 @@
         "php": ">=8.2",
         "ext-ctype": "*",
         "ext-iconv": "*",
+        "illuminate/collections": "^11.0",
         "symfony/console": "7.0.*",
         "symfony/dotenv": "7.0.*",
         "symfony/flex": "^2",
diff --git a/composer.lock b/composer.lock
index 9dafa0b..bfc776c 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,8 +4,203 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "46c9b05e72deefb09397e0367bf62db6",
+    "content-hash": "db9bab7397cd49e2e1fff83ef6f8d624",
     "packages": [
+        {
+            "name": "illuminate/collections",
+            "version": "v11.0.5",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/illuminate/collections.git",
+                "reference": "1a81a4ba053807ee5602e0dd27e9d8f5e779fc06"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/illuminate/collections/zipball/1a81a4ba053807ee5602e0dd27e9d8f5e779fc06",
+                "reference": "1a81a4ba053807ee5602e0dd27e9d8f5e779fc06",
+                "shasum": ""
+            },
+            "require": {
+                "illuminate/conditionable": "^11.0",
+                "illuminate/contracts": "^11.0",
+                "illuminate/macroable": "^11.0",
+                "php": "^8.2"
+            },
+            "suggest": {
+                "symfony/var-dumper": "Required to use the dump method (^7.0)."
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "11.x-dev"
+                }
+            },
+            "autoload": {
+                "files": [
+                    "helpers.php"
+                ],
+                "psr-4": {
+                    "Illuminate\\Support\\": ""
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Taylor Otwell",
+                    "email": "taylor@laravel.com"
+                }
+            ],
+            "description": "The Illuminate Collections package.",
+            "homepage": "https://laravel.com",
+            "support": {
+                "issues": "https://github.com/laravel/framework/issues",
+                "source": "https://github.com/laravel/framework"
+            },
+            "time": "2024-03-12T18:40:10+00:00"
+        },
+        {
+            "name": "illuminate/conditionable",
+            "version": "v11.0.5",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/illuminate/conditionable.git",
+                "reference": "e4c5c9b855c60c7bb16ce92ca9372684448cce47"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/illuminate/conditionable/zipball/e4c5c9b855c60c7bb16ce92ca9372684448cce47",
+                "reference": "e4c5c9b855c60c7bb16ce92ca9372684448cce47",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^8.0.2"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "11.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Illuminate\\Support\\": ""
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Taylor Otwell",
+                    "email": "taylor@laravel.com"
+                }
+            ],
+            "description": "The Illuminate Conditionable package.",
+            "homepage": "https://laravel.com",
+            "support": {
+                "issues": "https://github.com/laravel/framework/issues",
+                "source": "https://github.com/laravel/framework"
+            },
+            "time": "2023-02-07T10:39:14+00:00"
+        },
+        {
+            "name": "illuminate/contracts",
+            "version": "v11.0.5",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/illuminate/contracts.git",
+                "reference": "fae548ad43f569fc506f40385b2e0dcf1f4eb2c9"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/illuminate/contracts/zipball/fae548ad43f569fc506f40385b2e0dcf1f4eb2c9",
+                "reference": "fae548ad43f569fc506f40385b2e0dcf1f4eb2c9",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^8.2",
+                "psr/container": "^1.1.1|^2.0.1",
+                "psr/simple-cache": "^1.0|^2.0|^3.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "11.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Illuminate\\Contracts\\": ""
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Taylor Otwell",
+                    "email": "taylor@laravel.com"
+                }
+            ],
+            "description": "The Illuminate Contracts package.",
+            "homepage": "https://laravel.com",
+            "support": {
+                "issues": "https://github.com/laravel/framework/issues",
+                "source": "https://github.com/laravel/framework"
+            },
+            "time": "2024-02-23T15:52:10+00:00"
+        },
+        {
+            "name": "illuminate/macroable",
+            "version": "v11.0.5",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/illuminate/macroable.git",
+                "reference": "e1be58f9b2af73f242dc6a9add1f376b3ec89eef"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/illuminate/macroable/zipball/e1be58f9b2af73f242dc6a9add1f376b3ec89eef",
+                "reference": "e1be58f9b2af73f242dc6a9add1f376b3ec89eef",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^8.2"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "11.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Illuminate\\Support\\": ""
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Taylor Otwell",
+                    "email": "taylor@laravel.com"
+                }
+            ],
+            "description": "The Illuminate Macroable package.",
+            "homepage": "https://laravel.com",
+            "support": {
+                "issues": "https://github.com/laravel/framework/issues",
+                "source": "https://github.com/laravel/framework"
+            },
+            "time": "2023-06-08T14:08:27+00:00"
+        },
         {
             "name": "psr/cache",
             "version": "3.0.0",
@@ -208,6 +403,57 @@
             },
             "time": "2021-07-14T16:46:02+00:00"
         },
+        {
+            "name": "psr/simple-cache",
+            "version": "3.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/simple-cache.git",
+                "reference": "764e0b3939f5ca87cb904f570ef9be2d78a07865"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/php-fig/simple-cache/zipball/764e0b3939f5ca87cb904f570ef9be2d78a07865",
+                "reference": "764e0b3939f5ca87cb904f570ef9be2d78a07865",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.0.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psr\\SimpleCache\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "https://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interfaces for simple caching",
+            "keywords": [
+                "cache",
+                "caching",
+                "psr",
+                "psr-16",
+                "simple-cache"
+            ],
+            "support": {
+                "source": "https://github.com/php-fig/simple-cache/tree/3.0.0"
+            },
+            "time": "2021-10-29T13:26:27+00:00"
+        },
         {
             "name": "symfony/cache",
             "version": "v7.0.3",
diff --git a/src/Action/DetermineProjectLanguage.php b/src/Action/DetermineProjectLanguage.php
index 58e0565..be2113d 100644
--- a/src/Action/DetermineProjectLanguage.php
+++ b/src/Action/DetermineProjectLanguage.php
@@ -3,6 +3,7 @@
 namespace App\Action;
 
 use App\Enum\ProjectLanguage;
+use Illuminate\Support\Collection;
 use Symfony\Component\Filesystem\Filesystem;
 
 final class DetermineProjectLanguage implements DetermineProjectLanguageInterface
@@ -30,4 +31,25 @@ final class DetermineProjectLanguage implements DetermineProjectLanguageInterfac
 
         return ProjectLanguage::PHP->value;
     }
+
+    /**
+     * Return the languages used in the project.
+     *
+     * @return Collection<int, ProjectLanguage>
+     */
+    public function getLanguages(): Collection
+    {
+        $languages = collect();
+
+
+        if ($this->filesystem->exists($this->workingDir.'/composer.json')) {
+            $languages->push(ProjectLanguage::PHP);
+        }
+
+        if ($this->filesystem->exists($this->workingDir.'/package.json')) {
+            $languages->push(ProjectLanguage::JavaScript);
+        }
+
+        return $languages;
+    }
 }
diff --git a/src/Console/Command/InstallCommand.php b/src/Console/Command/InstallCommand.php
index 046bc52..d95cedf 100644
--- a/src/Console/Command/InstallCommand.php
+++ b/src/Console/Command/InstallCommand.php
@@ -12,6 +12,8 @@ use Symfony\Component\Console\Attribute\AsCommand;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Question\Question;
+use Symfony\Component\Console\Style\SymfonyStyle;
 
 #[AsCommand(
     description: 'Install the project\'s dependencies',
@@ -26,10 +28,41 @@ final class InstallCommand extends AbstractCommand
         $workingDir = $input->getOption('working-dir');
 
         if ($language === null) {
-            $language = (new DetermineProjectLanguage(
+            $languages = (new DetermineProjectLanguage(
                 filesystem: $this->filesystem,
                 workingDir: $workingDir,
-            ))->getLanguage();
+            ))->getLanguages();
+
+            // TODO: if more than one language is found, prompt to select which
+            // language to use. For now, always return the first language, which
+            // is consistent with what happens before this refactor.
+            $language = $languages->first()->value;
+
+            // TODO: throw an Exception if no language is found.
+
+            // TODO: if a project uses multiple languages, ask which language to use
+            // instead of using a default value?
+            //
+            // Currently, PHP will always be used over JavaScript if both are in the
+            // same project and an override, such as `versa install -l javascript`
+            // needs to be used to install the JavaScript/node dependencies.
+            //
+            // This could mean that `DetermineProjectLanguage` changes to
+            // `DetermineProjectLanguages` and returns a Collection of languages.
+            // If a single language is found, it is used. If multiple languages are
+            // found, the prompt is used to select which language to use.
+            if (false && $languages->count() > 1) {
+                $io = new SymfonyStyle($input, $output);
+
+                $choices = $languages
+                    ->mapWithKeys(fn (ProjectLanguage $language): array => [$language->value => $language->name])
+                    ->sort();
+
+                $language = $io->choice(
+                    question: 'Which language should I install',
+                    choices: $choices->toArray(),
+                );
+            }
         }
 
         assert(