en_tn/mat/05/19.md

whoever breaks

"whoever disobeys" or "whoever ignores"

the least one of these commandments

"any of these commandments, even the least important one"

whoever ... teaches others to do so will be called

This can be stated in active form. AT: "if anyone ... teaches others to do so, God will call that person" (See: rc://en/ta/man/translate/figs-activepassive)

least in the kingdom of heaven

The phrase "kingdom of heaven" refers to God's rule as king. This phrase is found only in Matthew. If possible use "heaven" in your translation. AT: "the least important in his heavenly kingdom" or "the least important under the rule of our God in heaven" (See: rc://en/ta/man/translate/figs-metonymy)

keeps them and teaches them

"obeys all these commandments and teaches others to do the same"

great

most important