Fix locale folder names

There seems to be some differences between the folder name and the locale name used in the files themselves.

For example: the folder might have been called "de-DE", for German, but the files use one "de"

And thus translations where not being displayed

Using the locale key in the files and modifying the folder name if neccesary, let's see what happens in the next Crowdin pull, might need to review more thoroughly why this is happening (maybe due to custom settings in Crowdin)

config/locales/de/i18n.yml

@@ -0,0 +1,4 @@
+de:
+  i18n:
+    language:
+      name: 'Deutsch'

config/locales/fa/i18n.yml

@@ -0,0 +1,4 @@
+fa:
+  i18n:
+    language:
+      name: 'فارسى'

config/locales/pl/general.yml

@@ -257,7 +257,6 @@ pl:
       text_sign_in: zaloguj się
       text_sign_up: zarejestruj się
       title: Jak mogę skomentować ten dokument?
-  locale: angielski
   notifications:
     index:
       empty_notifications: Nie masz nowych powiadomień.

config/locales/pl/i18n.yml

@@ -0,0 +1,4 @@
+pl:
+  i18n:
+    language:
+      name: 'Polski'

config/locales/sq/general.yml

@@ -249,7 +249,6 @@ sq:
       text_sign_in: Kycu
       text_sign_up: Rregjistrohu
       title: Si mund ta komentoj këtë dokument?
-  locale: Anglisht
   notifications:
     index:
       empty_notifications: Ju nuk keni njoftime të reja

config/locales/sq/i18n.yml

@@ -0,0 +1,4 @@
+sq:
+  i18n:
+    language:
+      name: 'Shqiptar'