Can you post the output of
$ strace chromium 2>&1 | grep \/sr\/
Just let chromium open the window and then close it normally.
Edit: To be more precise, since chromium uses its own ".pak" files for localization:
$ strace chromium 2>&1 | grep sr | grep pak
For example, I have:
access("/usr/lib/chromium/locales/sr-RS.pak", F_OK) = -1 ENOENT (Нема такве датотеке или директоријума)
access("/usr/lib/chromium/locales/sr.pak", F_OK) = 0
openat(AT_FDCWD, "/usr/lib/chromium/chrome_100_percent.pak", O_RDONLY) = 15
openat(AT_FDCWD, "/usr/lib/chromium/chrome_200_percent.pak", O_RDONLY) = 16
access("/usr/lib/chromium/locales/sr-RS.pak", F_OK) = -1 ENOENT (Нема такве датотеке или директоријума)
access("/usr/lib/chromium/locales/sr.pak", F_OK) = 0
openat(AT_FDCWD, "/usr/lib/chromium/locales/sr.pak", O_RDONLY) = 17
openat(AT_FDCWD, "/usr/lib/chromium/resources.pak", O_RDONLY) = 18