Update README.md

Author: turangarusso

README.md

@@ -84,6 +84,42 @@ To get translation result in the view, you can use:
 Text(network.users.resultText)
 ```
 
+The language into which the text should be translated. Options currently available:
+
+```
+BG - Bulgarian
+CS - Czech
+DA - Danish
+DE - German
+EL - Greek
+EN - English (unspecified variant for backward compatibility; please select EN-GB or EN-US instead)
+EN-GB - English (British)
+EN-US - English (American)
+ES - Spanish
+ET - Estonian
+FI - Finnish
+FR - French
+HU - Hungarian
+ID - Indonesian
+IT - Italian
+JA - Japanese
+LT - Lithuanian
+LV - Latvian
+NL - Dutch
+PL - Polish
+PT - Portuguese (unspecified variant for backward compatibility; please select PT-BR or PT-PT instead)
+PT-BR - Portuguese (Brazilian)
+PT-PT - Portuguese (all Portuguese varieties excluding Brazilian Portuguese)
+RO - Romanian
+RU - Russian
+SK - Slovak
+SL - Slovenian
+SV - Swedish
+TR - Turkish
+UK - Ukrainian
+ZH - Chinese (simplified)
+```
+
 > **Note**
 > You can found more information on: https://www.deepl.com/docs-api