How exactly does Mind Link work for Kalashtar? I know it says

You can speak telepathically to any creature you can see within 110 ft. of you. You don’t need to share a language with the creature for it to understand, but the creature must be able to understand at least one language.

As an action, when you’re speaking telepathically to a creature, you can give that creature the ability to speak telepathically with you for the next hour, or until you end this effect as an action.

But when you give the creature the ability to speak telepathically to you, does that mean you give it the ability to speak in a language you can understand? 

Yes Mind Link gives you the ability to speak telepathically with any creature able to understand at least one language. 

Alright cool, thanks! Wish the wording was a bit more clear in the original ability details haha