fix wrong session language in classroom-ladder (#6105)
fix wrong session language in classroom-ladder (#6105)

* fix wrong session language in classroom-ladder

* fix typo and move global @league as local league

Co-authored-by: smallst_wsl <6c42689ff77371401bf43b7d56b93ac1ca3e92d3@163.com>
codecombat/codecombat,javatlacati/codecombat,javatlacati/codecombat,codecombat/codecombat,codecombat/codecombat,javatlacati/codecombat,javatlacati/codecombat,codecombat/codecombat,codecombat/codecombat,javatlacati/codecombat