YOU SAID:
My sister is weird not
INTO JAPANESE
私の姉は変ではない
BACK INTO ENGLISH
My older sister is not strange
INTO JAPANESE
私の姉は不思議ではない
BACK INTO ENGLISH
My older sister is not wondering
INTO JAPANESE
私の姉は不思議ではありません
BACK INTO ENGLISH
My older sister is not strange
INTO JAPANESE
私の姉は不思議ではない
BACK INTO ENGLISH
My older sister is not wondering
INTO JAPANESE
私の姉は不思議ではありません
it is unlikely that this phrase will ever reach equilibrium