Fix dirty translatable attributes

src/Translatable.php

@@ -12,6 +12,8 @@ trait Translatable
 
     protected $overrideWithFallback = null;
 
+    protected $localeChanged = false;
+
     /**
      * Translated attributes cache
      *
@@ -287,6 +289,8 @@ public function setLocale($locale)
     {
         $this->overrideLocale = $locale;
 
+        $this->localeChanged = true;
+
         return $this;
     }
 
@@ -464,4 +468,38 @@ protected function newBaseQueryBuilder()
 
         return $builder->setModel($this);
     }
+
+    /**
+     * Get the attributes that have been changed since last sync.
+     *
+     * @return array
+     */
+    public function getDirty()
+    {
+        $dirty = parent::getDirty();
+
+        if(! $this->localeChanged) {
+            return $dirty;
+        }
+
+        foreach ($this->translatableAttributes() as $key) {
+            if(isset($this->attributes[$key])) {
+                $dirty[$key] = $this->attributes[$key];
+            }
+        }
+
+        return $dirty;
+    }
+
+    /**
+     * Sync the original attributes with the current.
+     *
+     * @return $this
+     */
+    public function syncOriginal()
+    {
+        $this->localeChanged = false;
+
+        return parent::syncOriginal();
+    }
 }

tests/TestCRUD.php

@@ -34,6 +34,19 @@ public function testModelCanBeStoredAndRetrievedInDifferentLocales()
         $this->assertEquals('DE Lorem ipsum', $user->bio);
     }
 
+    public function testModelWithIdenticalTranslationsIsSaved()
+    {
+        User::forceCreate([
+            'name' => 'John Doe'
+        ], [
+            'en' => ['bio' => 'Sample bio'],
+            'de' => ['bio' => 'Sample bio'],
+        ]);
+
+        $this->assertEquals('Sample bio', User::withoutFallback()->onlyTranslated('en')->first()->bio);
+        $this->assertEquals('Sample bio', User::withoutFallback()->onlyTranslated('de')->first()->bio);
+    }
+
     public function testFallbackLocaleIsUsedWhenNoMatchingLocaleIsFound()
     {
         User::forceCreate([