This card's OCG and TCG rulings contradict each other. Differences In the OCG, this card's effect will activate if it was Tribute Set. This is not true in the TCG.

TCG Rulings

Judge Program Forum Rulings

• The effect of "Tongue Twister" will only activate if it was Tribute Summoned. It will not activate if it was Tribute Set.^[1]

OCG Rulings

• When "Tongue Twister" is sent to the Graveyard, its effect starts a chain. The effect is not optional.^[2]

• The "Draw" and "Remove from Play" effects are not considered to resolve simultaneously. Your opponent cannot activate "Appropriate" after this card's effect resolves.^[3]

• If "Tongue Twister" is Tribute Set and then sent to the Graveyard while face-down on the field, then its effect will still activate.^[4]

References

1. ↑ Konami Judge Program Forum: Tongue Twister dying after being set.
2. ↑ Konami FAQ: Effect Monster > Tongue Twister
3. ↑ Konami FAQ: For "Tongue Twister"'s "Draw" and "Remove from Play" effects, are they treated to resolve simultaneously?
4. ↑ Konami FAQ: When "Tongue Twister" was Tribute Summoned and Set, when it is sent to the Graveyard while face-down, can you draw?