"str0101 Line"
It's a line in script, where there is a syntax error.
"str0258 Switch to the next window pane"
"str0259 Switch back to the previous window pane"
"str0264 Split the active window into panes"
"str0286 Activate Task List"
These are the hint for the "Window" menu items. They are probably unused (generated by wizard again...)
"str1049 Parsing file"
"str1053 Parsing merge file"
"str1054 Error opening merge file"
"str1064 Warning"
Those lines are used by the template parser (when you are adding a new entity/scene etc.). Those strings are only visible when there's some error in a template file.
"str1074 String tables"
"str1075 Font files"
"str1076 Sprite files"
"str1077 Definition files"
"str1078 Items files"
And these are used in the file open dialogs, in the "Filter" field.
Oh... and the icons in the toolbar use the english translation (new, copy, paste etc) and not the greek one...
Yep, it's a known bug
It's not exactly easy to override those tooltips...