(biblical) Tower of Babel

tower of Babel (situation where the use of many different languages is a source of confusion)

cabinet of curiosities

Pandora's box (source of unforeseen trouble)

(transitive) to know by sight

(literary) for a long time

working language (language that is given a unique legal status in an international organization or other supranational body as its primary means of communication) / working language (language that a translator or interpreter works with)

trash heap of history, ash heap of history

(Christianity) thanksgiving (expression of gratitude to God)

social reality, social phenomenon