ludic/changes/i18n-error-mode.md

bump: minor type: feature English left is an error (phase 26.9). Under a lang line, a template's own words, a text attribute's, a quoted choice that reads as words and a @Text row still holding English now refuse the build, where they were warnings; ludic deps still counts them as english_left. Hole counts and undescribed splits stay warnings. ludic.ui's own words - the key field's "Right click", "Middle click", "Left click" and "press a key..." - are keys (ui_tk(ui_st, k"ui.right_click", plain), ui.* in the program's .po), with their plain English for a program that binds no translator.