ah...ok...That'll suck. I've no trouble with trans or gender fluidity. But reading the they pronoun always hurts/confuses my head. It has always been hard wrapping my brain around it. ^^'
I don't think being gender fluid is the same as being partially male or partially something else.
A gender-fluid person may feel a gender some days and other days another gender, and so they have multiple pronouns to match them (or not) to their current gender.