The Bug:
The "#X" characters (where "X" represents a number) that are displayed within filled map tooltips when advanced tooltips are hidden are missing a translation key.
Please note that when advanced tooltips are shown, the "filled_map.id" string is displayed within filled map tooltips, therefore this issue can only be reproduced when advanced tooltips are hidden.
Steps to Reproduce:
Attempt to search for the existence of this string by using [this search filter|https://crowdin.com/translate/minecraft/all/enus-engb?filter=advanced&value=12&verbal_expression_scope=translations&sort_method=5#q=#%25s] on the official Minecraft crowdin project.
Take note as to whether or not text within filled map tooltips when advanced tooltips are hidden is untranslatable.
Observed Behavior:
Text within filled map tooltips when advanced tooltips are hidden is untranslatable.
Expected Behavior:
Text within filled map tooltips when advanced tooltips are hidden would be translatable.
Can confirm.