Translation reviewers

I've just seen that users can become translation reviewers. Where can users request that right? What are the conditions?

Translation reviewers can make other users a translation reviewer. It's a beta functionality that is not yet completely implemented (but it works somewhat). It adds a more formal review process, although there are no consequences for when translations are exported to the respective products. Obviously, only the most experienced translators for a language should be reviewers.

I found this thread from seach. When do you plan to implement all/effective function? What/when should we (translators) prepare? Don't we have to do anything now?

The feature is now fully working, although it's subject to future improvements. Nothing changes for translators in general, but if one wants to do some sistematic work to improve quality of translations in one's own language, this provides handy tools. You might have read Thread:Support/Using FlaggedRevs to allow reviewing translations and in particular this, it applies to you as well. :-) Nike is currently writing documentation, so if you have suggestions on things to cover and so on they'll be appreciated.

One question: I am under the impression that the review tool is a completely personal feature, meaning that even if a message is accepted by Translator-A it will still show up to Translator-B's tool as unreviewed one until B accepts or modifies it. Is that correct?

Yes, but the user will see that it's been reviewed by n other reviewers. This does not mean that it's a completely personal feature, only that everyone can choose what to work on, a review is not a quality rubberstamping exercise and the more reviews there are the better.

So you mean, even if no reviewer accepted it, the new translation shows up to users through LocalisationUpdate etc?

Of course! This is how it's always worked and it will always be like this. The translation review had been introduced recently and its aim is not to be a filter (not here, at least). Please read mw:Help:Extension:Translate/Quality assurance.

I've read. Thank you!