en previous month (Igbo) Z16990
en Function

᱑᱕:᱐᱒, ᱑᱓ ᱡᱩᱱ ᱒᱐᱒᱔ ᱧᱮᱞᱟᱹᱨᱩ ᱞᱮᱠᱟᱛᱮ

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@@ ᱫᱷᱟᱹᱲ ᱗᱓: / ᱫᱷᱟᱹᱲ ᱗᱓: @@
                 "Z1K1": "Z11",
                 "Z11K1": "Z1002",
-                "Z11K2": "Return the month before a given Igbo month"
+                "Z11K2": "returns the month before a given Igbo month"
             }
         ]