  We present Charles University submissions to the WMT22 General Translation
Shared Task on Czech-Ukrainian and Ukrainian-Czech machine translation. We
present two constrained submissions based on block back-translation and tagged
back-translation and experiment with rule-based romanization of Ukrainian. Our
results show that the romanization only has a minor effect on the translation
quality. Further, we describe Charles Translator, a system that was developed
in March 2022 as a response to the migration from Ukraine to the Czech
Republic. Compared to our constrained systems, it did not use the romanization
and used some proprietary data sources.
