Andrew,
1- The thing about the transitions, if it is the same patch, I already tried it and now it works perfectly. The fact that the default transition is in English is not important, when it is configured it is in the local language, but when the window is reopened it appears in English, but I reiterate that this is not important and that it works perfectly.
2- I replaced the files mwindow.h and mwindow.C that you attach, when compiling this error appeared:
mwindow.C:1032:9: warning: unused variable ‘result’ [-Wunused-variable]
int result;
^~~~~~
But it compiled and installed fine.
2.1 But when opening a project in local mode, all the effects and transitions used in this project generated an error, the error said that these effects and transitions did not belong to Cinelerra.
2.2 It is true that now from the terminal the xml files are no longer overwritten or deleted, but the render still does not work.
3- The tags in the title effect works fine but the translations are lost in working in local mode. This point is my fault, maybe these tags shouldn't be translated.
Sincerely Rafa.