To be honest this is one of the considerable worries I have too. But my worries are singularly on the actual booking mobile phone call. As if I get someone who I simply cannot understand using broken english and a very strong accent and that causes problems as prostitutes - especially foreign ones - have a habit of getting very angry on the phone if you say you cannot understand what they say.
And I don't relish the prospect of my number being shoved up on the likes of Saafe on the allegation that I am a timewaster just because some girl doesn't get someone who can speak better english to take her calls for her.
I really wouldn't worry, if she can't speak enough English on the phone she's unlikely to go to the extent of posting on SAAFE etc. I know what you mean though, I get frustrated when they just say yes baby
to everything, end the call with something like 'I'll call you when I can make it' and move on. It's still better than talking to a maid / pimp who speaks decent English and still says yes baby
to everything where what they should be saying is not a fucking chance
As Jimmy says, get a punting phone, very cheap these days and PAYG is disposable should you run into trouble.