CREATE TABLE table_203_88 (id DECIMAL, "language" TEXT, "number" DECIMAL, "percentage  ( % ) " DECIMAL, "males" DECIMAL, "females" DECIMAL)

what is the highest percentage of speakers other than polish ?
SELECT "language" FROM table_203_88 WHERE "language" <> 'polish' ORDER BY "percentage (%)" DESC LIMIT 1
SELECT "language" FROM "table_203_88" WHERE "language" <> 'polish' ORDER BY "percentage (%)" DESC NULLS LAST LIMIT 1