What does the writing behind the clothes worn by the heroine in the movie Million Dollar Baby mean?

In Irish (Gaelic), Mo Cuishle means my dear, my blood (my dear, my flesh and blood).

When the heroine began to emerge, the coach blurted out the word "Motrichler", which later became the slogan on the shirt that the coach gave her. Boxing fans in the film didn't know it was an Irish phrase, but shouted enthusiastically when the heroine appeared in the game, so the audience in the audience regarded the heroine as their treasure. Unknown so's heroine has been waiting for the coach to tell her what this sentence means, but the coach finally explained, "My baby, my blood". My blood, my flesh and blood, English can better convey the coach's wish to treat Maggie as his own, but unfortunately the Chinese subtitle is only translated into "My baby, my child".

I checked the Chinese subtitles translated by Newmoff and TLF, but they are all transliteration, HOHO.