Change “Theorem” to “Věta” in beamer

I tried to use \uselanguage{Czech}\languagepath{Czech} as suggested in Babel (French) does not translate the theorem environment in Beamer class, but I still get "Theorem" instead of "Věta" for my theorem. How can I teach beamer the Czech words? And can I submit the language mutations to CTAN somehow to make the widely available?

MWE:

\documentclass{beamer}
\usepackage[czech]{babel}
\uselanguage{Czech}
\languagepath{Czech}
\usepackage[utf8]{inputenc}
\usetheme{Copenhagen}
\begin{document}
\begin{frame}
\begin{proof}
Some text
\end{proof}
\begin{theorem}
Some text
\end{theorem}
\end{frame}
\end{document}

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–  Ignasi Mar 28 at 11:00

There is no Czech dictionary provided along with the translator subpackage of Beamer, so you need to help it; the proof name is changed, because babel knows about \proofname.

\documentclass{beamer}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[czech]{babel}

\uselanguage{Czech}
\languagepath{Czech}

\usetheme{Copenhagen}

\deftranslation[to=Czech]{Theorem}{Věta}

\begin{document}
\begin{frame}
\begin{proof}
Some text
\end{proof}
\begin{theorem}
Some text
\end{theorem}
\end{frame}
\end{document}


I then copied translator-theorem-dictionary-English.dict to translator-theorem-dictionary-Czech.dict in the current directory and changed the relevant line, obtaining the desired result even after removing the \deftranslation line, because the file was read, as shown by

(./translator-theorem-dictionary-Czech.dict)


in the log file.

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