When Israel went out of Egypt, the house of Jacob from a people of strange language;
Psalms 114:1-8.-Yahweh owned Israel as His after her departure from Egypt, by driving back the Red Sea and the Jordan; the mountains also were moved (Psalms 114:1-4); personification: the sea asked why it fled? the answer (Psalms 114:5-8). God's past mighty deeds for His Church rebuke her unbelieving fears when the world-powers as a sea threaten her destruction.
When Israel went out of Egypt, the house of Jacob from a people of strange language - even as now they were recently delivered from the Babylonians (aliens in language), to whom, according to Moses' prophecy (Deuteronomy 28:49), they had been captives. It enhances the joy of Israel's deliverance out of Egypt to remember how alien in thought, of which "language" is the index, was the people from under bondage to whom she was delivered (cf. Psalms 81:5).