This patch backports the new feature to disable copy- / translate- buttons from TYPO3 9.x to TYPO3 8.7
See https://review.typo3.org/#/c/52345/ for details.
The localization actions "Translate" and "Copy" are then toggleable by PageTS and UserTS.
mod.web_layout.localization.enableCopy = 1
mod.web_layout.localization.enableTranslate = 1