Translated word is not being used

A very simple detail is not translated to the language I prefer to use the playing OGS site. I even found the fact strange, since most things are translated to Portuguese. If it was not me who translated it years ago, it should be someone else.

I checked it now, anyway. The text to be translated is the word “Message” that we see in the chat window of a game, when the kind of message to be sent is neither “private” or “Malkovich”. I found 21 parts to be translated with the word “message” in it. There is only one occurrence of the word alone (as it should be used for this, I assume). Am I missing something here? Or what is the problem?

Thank you