If I change a word from English to Portuguese inside any of the formulas from
https://pt.wikipedia.org/wiki/Special:ContentTranslation?page=Riemann+hypothesis&from=en&to=pt&targettitle=Hip%C3%B3tese+de+Riemann
and save the translation, the next time I open it the change is lost and I have to translate it again. For example, I replaced "prime" by "primo" in the following code:

\zeta(s) = \prod_{p \text{ prime}} \frac{1}{1-p^{-s}}= \frac{1}{1-2^{-s}}\cdot\frac{1}{1-3^{-s}}\cdot\frac{1}{1-5^{-s}}\cdot\frac{1}{1-7^{-s}} \cdot \frac{1}{1-11^{-s}} \cdots

and every time I open the translation tool, the translation is replaced by the English text again.