first, when i got in languages import tool, i saw the error prompt. "Because Moodle can not connect to download.moodle.org, we are unable to do language pack installation automatically. Please download the appropriate zip file(s) from the list below, copy them to your /var/www/vhosts/xxxx/httpdocs/moodledata/lang/ directory and unzip them manually."
then, i downloaded the zip file and uploaded unzipped files into moodledata/lang forlder. after that, i refreshed the page. but the english language pack is still the only one in "installed language packs" list.
is there anyone could give me some advices? thanks!