tablespoon を英語に訳すと？

日本における「大さじ」と同じです。

Measuring Tools the amount of tablespoonful?
:Measuring Tools and How to Use Them.
https://bookstore.ksre.ksu.edu/pubs/MF3518.pdf
:Cooking Equivalents and Measures.
https://www.exploratorium.edu/food/measurements
:Handy Measures.
https://www.thewi.org.uk/education-and-training/education/activities/food-and-cookery/cooking-tips/handy-measures
:Measuring Ingredients
https://www.bhg.com/recipes/how-to/bake/how-to-measure-baking-ingredients/