Nope! Please do not do this!
I have been the UK colleague, and while I shared commonality with a foreign colleague, I also shared an understanding of the CULTURAL air of arrogance and superiority she carried, that others took time to pick up on, and it grated me!
She also was the worst team player to most the teams knowlege and experience of working with her! Like your colleague, she was absolutely fabulous at her job, she had a real knack for it, but lacked in the language and British culture department! But she'd point blank refuse to be a team player and help her colleagues where she absolutely could, was a 'loner' at work because she'd grate everyone with her user ways and heavily relied on pity party friendships with a few people who were average performers or too young to pick up on her cunning ways.
She was the most disliked, and she'd earned the dislike. She was given many chances by us all to deliver in being half decent! But no, she was money hungry and had no self respect to even maintain face with anyone, but would still shamelessly ask for help and expect you to oblige! And the loner ways was how she preferred to work.
Had someone asked me to help her, I would be pissed off and majorly offended, because:
A) doesnt she need to learn English, so why can't any English speaking colleague help her? Why does it have to be the one who has commonality? Commonality of culture and language does not mean commonality beyond that, so its very presumptuous and tone deaf of you!
B) It's not my job to take responsibility for someone's ability to succeed at their job. Anyone who does this is a gem or a fool. Gems don't get rewarded!
C) Such colleagues don't need your average team mate support, they need coaching and guiding, frankly speaking, that is a managers job, and not a big headed, oh so nice, look at me being inclusive but then palming off the actual task to a colleague colleague. Don't brown nose so hard please. I can imagine you're not paid enough for it.