you can limit the number of languages when marking for translation, if you are only contacting a few wikis: find the relevant option at the bottom of the page when you mark it for translation.
Ask ambassadors for help with translations and/or watching conversations
head to the Special:ExportTranslations page for the desired message (example);
select the desired code from the dropdown, and click Fetch;
copy the body of the message; you don't need the DISPLAYTITLE bit, except for the translated part of it, that is going to become the title of your thread - in the example given above, the only part you'll retain for Swedish is "Byte till Remex", and you'll make a ==heading== out of it; you don't need the languages tag, while as a signature you'll use [[:mw:User:SSastry (WMF)]], ~~~~~ (that's 5 tildes, for timestamp only) so that it points to your Mediawiki page;