Google Assistant's language support was expanding quickly toward the end of 2018, but since the beginning of this year, the rate of additions slowed down considerably. As Google I/O nears, we're sure to see those pick up pace a little. Case in point, Assistant now supports Arabic (Egypt) and (Saudi Arabia). The former appears to be in open beta and available to all, while the latter is in closed beta and only showing for a few people.
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