old_contents: #! /usr/bin/env python
  # -*- python -*-
  # -*- coding: utf-8 -*-
  
  lang = {
      "lang": "en",  # same as filename
      "flPoint_comma": False,  # floating point symbol is `,` instead `.`
      "translator": "Jüri Kormik"
      }
  
  messages = {
      "program.ext":      [".json", ".pickle"],
      "program.title":    "Simple Unit Converter",
      "program.author":   "Author",
      "program.version":  "Version",
  
      "program.err.title":  "Datafile unsaved",
      "program.err.text":   "Datafile is not saved.\nAre you sure you want to exit the program?",
  
      # Statusbar messages
      "status.saving_mode":  ["<NONE>", " JSON ", "PICKLE"],
      "status.no_datafile":  "Datafile not found.",
      "status.data_saved":   "Datafile saved.",
  
      "status.selected_list":  "Selected unit list:  ",
      "status.added_list":     "Added units list:  ",
      "status.list_exists":    "Appendable units list already exists.",
  
      "status.selected_unit":  "Selected unit:  ",
      "status.added_unit":     "Added unit:  ",
      "status.unit_exists":    "Appendable unit already exists.",
  
      "status.added_multiplier":  "Added/Changed multiplier:  ",
  
      "status.selected_from":  "Selected unit to:  ",
      "status.selected_to":    "Selected unit from:  ",
  
      # Universal button texts
      "button.close":   "Close",
      "button.add":     "Add",
      "button.change":  "Add/Change",
      "button.cancel":  "Cancel",
  
      # Frame texts
      "main.button.convert":  "Unit Converter",
      "main.button.units":    "Add/Change Units",
      "main.button.save":     "Save data",
      "main.button.about":    "About",
  
      "converter.button.calc":  "Calc",
  
      "units.label.units_list":  "Units list",
      "units.label.base":        "Base unit (for info)",
      "units.label.converter":   "Unit converter",
      "units.label.unit":        "Unit",
      "units.label.multiplier":  "Multiplier",
      "units.button.save":       "Save",
      }
  
new_contents: #! /usr/bin/env python
  # -*- python -*-
  # -*- coding: utf-8 -*-
  
  lang = {
      "lang": "english",  # should be in english
      "flPoint_comma": False,  # floating point symbol is `,` instead `.`
      "translator": "Jüri Kormik"
      }
  
  messages = {
      "program.ext":      [".json", ".pickle"],
      "program.title":    "Simple Unit Converter",
      "program.author":   "Author",
      "program.version":  "Version",
  
      "program.err.title":  "Datafile unsaved",
      "program.err.text":   "Datafile is not saved.\nAre you sure you want to exit the program?",
  
      # Statusbar messages
      "status.saving_mode":  ["<NONE>", " JSON ", "PICKLE"],
      "status.no_datafile":  "Datafile not found.",
      "status.data_saved":   "Datafile saved.",
  
      "status.selected_list":  "Selected unit list:  ",
      "status.added_list":     "Added units list:  ",
      "status.list_exists":    "Appendable units list already exists.",
  
      "status.selected_unit":  "Selected unit:  ",
      "status.added_unit":     "Added unit:  ",
      "status.unit_exists":    "Appendable unit already exists.",
  
      "status.added_multiplier":  "Added/Changed multiplier:  ",
  
      "status.selected_from":  "Selected unit to:  ",
      "status.selected_to":    "Selected unit from:  ",
  
      # Universal button texts
      "button.close":   "Close",
      "button.add":     "Add",
      "button.change":  "Add/Change",
      "button.cancel":  "Cancel",
  
      # Frame texts
      "main.button.convert":  "Unit Converter",
      "main.button.units":    "Add/Change Units",
      "main.button.save":     "Save data",
      "main.button.about":    "About",
  
      "converter.button.calc":  "Calc",
  
      "units.label.units_list":  "Units list",
      "units.label.base":        "Base unit (for info)",
      "units.label.converter":   "Unit converter",
      "units.label.unit":        "Unit",
      "units.label.multiplier":  "Multiplier",
      "units.button.save":       "Save",
      }
  
subject: Change lang["lang"] value