Extending the support for Machine translation in Content Transltion is often requested. I compiled some of those requests from the Content Translation discussion page to provide a better overview:

• French.
  • "traduction automatique en francais" (view)
  • "la version bêta du traducteur prend elle en charge la traduction de english vers français ?" ([[ la version bêta du traducteur prend elle en charge la traduction de english vers français ? | view ]])
  • "I've just tried to translate a few pages from English and various languages into French but it says that automatic translation is not available for French." (view)
• Russian
  • "Hello, I need English to Russian machine pretranslation, yet it is absent." (view)
  • "Why doesn't it work for english-russian translation?" (view)
  • "can this extension use other engines? Сan we now take it and turn it on ru.wikipedia.org but adding localy translator yandex and/or google?" (view)
• German.
  • "Another, already mentioned, issue is the inability to use the automatic machine translation feature for English to German." (view)
  • "No machine translation available. This is not a big deal for a short article, but for a longer article I would find machine translation very useful as a starting point." (view)
  • "But I would like to have an automatic translation to work on. " (from Dutch) (view)
• English.
  • "fr -> en" (view)
  • "Doesn't work at all. "Not available" for German to English" (view)
• Hindi.
  • "the original english text is only getting pasted over there with an error in right window that Machine Translation is not available in Hindi (यांत्रिक अनुवाद हिंदी में उपलब्ध नहीं है.). So, just wanted to know When translation is not available then why the tool is available in my preferences?" (view)
  • "good news is that it is working fine on hiwiki but its machine translation is not working (you may check)" (view)
• Ukranian.
  • "For some reason, translation from Spanish to Ukrainian does not work. Please enable the feature." (view)
  • "Russian to Ukranian" (view)
• Turkish.
  • "English-Turkish translation is also useless." (view)
  • "This beta feature experience said. But it failed to translate any article." (view)
• Albanian.
  • "can you please add machine translation for Albanian (sq.wikipedia)? I have checked the translation quality [ EN > SQ, in Yandex Translation], and I believe it would be of substantial help if it is enabled." (view)
• Japanese.
  • "It seems automatic Japanese translation is not supported at this time." (view)
• Italian.
  • "English -> Italian translation don't work" (view)
• Serbian.
  • "Why don't add serbian language, use Google Translate, why using some other-side Apertium?" (view)
• Arabic.
  • "Auto translation not working for Arabic Language" (view)
• Konkani
  • "I translated an article from English to GOM (Konkani) and it doesn't seem to get uploaded." (view)
• Welsh.
  • "Without Machine Translation, this tool is an electric drill with no power. When will it be turned on, please?" (view)
• Nepali.
  • "Thanks for enabling content translation in Nepali , is there a way machine translation could be enabled too ?" (view)
• Polish
  • ":(" (view)
• Belarusian.
  • "Thanks, it works now. But now it tells that machine translation is not available. What is needed to turn it on?" (view)
• Amharic.
  • "The tool has a great UI and works as expected. Although machine translation into Amharic is not currently possible" (view)
• Armenian.
  • "Could you please add one of machine translation services which is also available for Armenian (Yandex or Google translate)?" (view)
• Czech.
  • "I have found there is no machine translation to or from Czech language supported yet" (view)
• Danish.
  • "English to Danish" (view)
• Portuguese
  • "translate from english to other languages too, especially portuguese" (view)