An diofar eadar na mùthaidhean a rinneadh air "1640an"

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b r2.6.4) (robot Removing: ksh:1640-er Joohre
b r2.6.5) (robot Adding: yo:Ẹ̀wádún 1640
Loidhne 76:
[[uz:1640-lar]]
[[vi:Thập niên 1640]]
[[yo:Ẹ̀wádún 1640]]
[[zh:1640年代]]
[[zh-yue:1640年代]]