Applying for PhD admission with a master's thesis written in Spanish I'm finishing my MS in a Spanish speaking country and my MS thesis is written in Spanish. If I apply for being admitted in a PhD program in a non-Spanish speaking country, should I expect them to accept my MS thesis as it's currently written (i.e. in Spanish)? Also, I could translate it into English in a week or two but, then, that version of the thesis would not be any more the official one(i.e. the approved by the evaluating committee). Would they accept this translated version of the thesis for the application instead of the original one?

(When I said 'accept it' I meant 'consider the possibility of reviewing it and conclude something about my performance or the depth of my MS work'.)

I'm particularly interested in European countries and the US, but I know that there may be cultural or idiosyncratic differences, even between different institutions within the same country. For example, I expect greater chances for my Spanish written thesis to be accepted in Portugal than in Poland. So what I want to know is if there is some general pattern that I should expect from them, like, rejecting it with a high probability... or accepting it with a high probability, given that Spanish is one of the most spoken languages in the world and popular in Occident, unlike Chinese.
Maybe I'm confused by wording, but I think it is incorrect to think in terms of programs 'accepting' a thesis.

There might be cases where a program cares about the gritty details of your thesis, and so the short answer is to specifically ask the department you are applying to.

In the US, I highly doubt any PhD program would ask for your thesis, review it, then make a acceptance decision based on this.  Publishing your thesis is optional, and there is no expectation that you have to in order to be accepted into a PhD (generalization).  Also, a MS is not a requirement for a PhD program in the US, and so there's no rule about accepting an applicant's thesis.

When I applied to PhD programs in the US, Scandinavia, and the Netherlands, no one asked to review my thesis, or discussed accepting my thesis.

What could be useful is to translate the thesis abstract.  Then, if someone asks for more details, you have something on hand to give them.