Changed suggested naming for guide translations to use -

docs/internals/translations.md

@@ -31,13 +31,13 @@ of the guide](../guide/i18n.md) for details.
 Documentation
 -------------
 
-Put documentation translations under `docs/<original>_<language>` where `<original>` is the original documentation name
+Put documentation translations under `docs/<original>-<language>` where `<original>` is the original documentation name
 such as `guide` or `internals` and `<language>` is the language code of the language docs are translated to. For the
-Russian guide translation it is `docs/guide_ru`.
+Russian guide translation it is `docs/guide-ru`.
 
 After initial work is done you can get what's changed since last translation of the file using a special command from
 `build` directory:
 
 ```
-build translation ../docs/guide" "../docs/guide_ru" --title="Russian guide translation report" > report_guide_ru.html
+build translation ../docs/guide" "../docs/guide-ru" --title="Russian guide translation report" > report-guide-ru.html
 ```