Are Spanish people naturally more flirty?

Do you mean people from Spain or people who speak Spanish such as Latin Americans?

No 😂😂 I have Spanish family friends and have worked with a Spanish woman, and I would say because of the language barrier she was actually more focussed etc at work so less "flirty"! It's someone's personality that's going to make them more flirty and if there's a spark!

Definitely not! If it was my partner with a female colleague, I'd be annoyed! It's a boundary in a relationship!

The fact is that you have a problem, and it is causing an argument while he does absolutely nothing about it when he can. You can be annoyed about anything you like. Seems a little gaslighty of him but I could just be reading more into it.

im not sure if its spanish people per se, but i think for some reason at least for me, when people have sort of an accent it can make what they’re saying SOUND flirty or more friendly based on the dialect and tone but i don’t think that’s how they mean to come across and it’s not everyone

I've asked my partner his thoughts on this and he agrees that for her to be texting him in a flirty way is not right. Even if she isn't meaning to be flirty or he believes she isn't, he should be willing to accept that it's making you feel uncomfortable and shut down the conversation for your peace.

He doesn't have to straight up tell her "stop texting me in a flirty way" etc because this may cause him issues at work, but he should shut down the conversation with blunt replies and not replying to her straight away, and give it hours/a day before messaging back.

a positive we can take from this is that he isn't hiding these messages from you and is happy for you to read them and is being open and honest.
It's a very odd situation though, it's not how I would message a male colleague, as it could be classed as harassment, and could lead to dismissal if they take it the wrong way and report it. "Inappropriate" shorts could be because they are denim shorts/ripped shorts/character shorts etc that aren't allowed in a work place, so it's questionable that's she's gone straight to the length of them!
There's nothing that can be done about him having to talk to her at work, but if he broke the texting down with her amicably, then hopefully that will help you with how it's making you feel, if she still manages to message back on empty messages then I would say she is flirting with him!

What I do not understand is why is she texting him,why not delete her number

All your husband needs to do is keep it professional if he feels she is flirting then he just do not entertain it,and hopefully she will get the message