Author: Huong Nguyen
MDL-85027 AI: Revert lang string changes from MDL-83216
This revert commit 2f10fde
for core_ai language strings file.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=79e3d6d05049e292fb0d8e96ae6b3d47fd5feedf
http://github.com/moodle/moodle/commit/79e3d6d05049e292fb0d8e96ae6b3d47fd5feedf
+ 5.0 en [enableuserratelimit_help,core_ai]