If you want to create a link, where no other link previously existed in the original message, then you create it just like you were editing a regular page on wiki. So this sentence:

Komunitatearen atariak Wikipedian barrena zer gertatzen ari den esploratzeko modua ematen dizu

becomes something like this:

[[:hu:Portál:Közösség|Komunitatearen atariak]] Wikipedian barrena zer gertatzen ari den esploratzeko modua ematen dizu

or like this:

[https://www.example.com Komunitatearen atariak] Wikipedian barrena zer gertatzen ari den esploratzeko modua ematen dizu

Also, you don't have to create Phabricator tasks to ask questions like this. You can post your questions on the wiki on Sage's talk page (go to https://meta.wikimedia.org/wiki/User_talk:Sage_(Wiki_Ed) ) or on the talk page for the page that you're translating.