Please do not release 7.7 before solving/taking a decision on this reported bug
Reports empty if conditions strings for aor_sql_operator_list are translated · Issue #1662
Also discussed here
SuiteCRM -– CRM for the world -: German Language Pack - Reports not working correct (1/1) - https://suitecrm.com/forum/international-language-support/8276-german-language-pack-reports-not-working-correct