i18n: Apply code review suggestions + code cleaning

src/invidious/helpers/i18n.cr

@@ -131,15 +131,14 @@ def translate_count(locale : String, key : String, count : Int, format = NumberF
 
     if LOCALES[locale].has_key?(key + singular_suffix)
       translation = LOCALES[locale][key + singular_suffix].as_s
+    elsif locale != "en-US"
+      # Try #2: Fallback to english
+      translation = translate_count("en-US", key, count)
     else
-      # Try #2: Fallback to english (or return key we're already in english)
-      if locale == "en-US"
+      # Return key if we're already in english, as the tranlation is missing
       LOGGER.warn("i18n: Missing translation key \"#{key}\"")
       return key
     end
-
-      translation = translate_count("en-US", key, count)
-    end
   end
 
   case format

src/invidious/helpers/i18next.cr

@@ -139,10 +139,7 @@ module I18next::Plurals
       self.init_rules
     end
 
-    def init_rules # : Hash(String, PluralForms)
-      # Init
-      # forms = {} of String => PluralForms
-
+    def init_rules
       # Look into sets
       PLURAL_SETS.each do |form, langs|
         langs.each { |lang| self.forms[lang] = form }