changed name of event triggered when config is changed and introduced new event when language is changed

app/views/play/level/modal/editor_config_modal.coffee

@@ -54,13 +54,15 @@ module.exports = class EditorConfigModal extends View
     super()
 
   onHidden: ->
+    oldLanguage = @aceConfig.language
     @aceConfig.language = @$el.find('#tome-language').val()
     @aceConfig.invisibles = @$el.find('#tome-invisibles').prop('checked')
     @aceConfig.keyBindings = @$el.find('#tome-key-bindings').val()
     @aceConfig.indentGuides = @$el.find('#tome-indent-guides').prop('checked')
     @aceConfig.behaviors = @$el.find('#tome-behaviors').prop('checked')
     me.set 'aceConfig', @aceConfig
-    Backbone.Mediator.publish 'change:editor-config'
+    Backbone.Mediator.publish 'tome:change-config'
+    Backbone.Mediator.publish 'tome:change-language' unless @aceConfig.language is oldLanguage
     me.save()
 
   destroy: ->

app/views/play/level/tome/spell.coffee

@@ -85,11 +85,13 @@ module.exports = class Spell
     aether.hasChangedSignificantly (newSource ? @originalSource), (currentSource ? @source), true, true
 
   createAether: (thang) ->
+    aceConfig = me.get 'aceConfig' ? {}
     aetherOptions =
       problems:
         jshint_W040: {level: "ignore"}
         jshint_W030: {level: "ignore"}  # aether_NoEffect instead
         aether_MissingThis: {level: (if thang.requiresThis then 'error' else 'warning')}
+      language: aceConfig.language ? 'javascript'
       functionName: @name
       functionParameters: @parameters
       yieldConditionally: thang.plan?
@@ -107,5 +109,12 @@ module.exports = class Spell
     aether = new Aether aetherOptions
     aether
 
+  updateLanguageAether: ->
+    aceConfig = me.get 'aceConfig' ? {}
+    for thangId, spellThang of @thangs
+      spellThang.aether?.setLanguage (aceConfig.language ? 'javascript')
+      spellThang.castAether = null
+    @transpile()
+
   toString: ->
     "<Spell: #{@spellKey}>"

app/views/play/level/tome/spell_view.coffee

@@ -38,8 +38,9 @@ module.exports = class SpellView extends View
     'modal-closed': 'focus'
     'focus-editor': 'focus'
     'tome:spell-statement-index-updated': 'onStatementIndexUpdated'
+    'tome:change-language': 'onChangeLanguage'
+    'tome:change-config': 'onChangeEditorConfig'
     'spell-beautify': 'onSpellBeautify'
-    'change:editor-config': 'onChangeEditorConfig'
 
   events:
     'mouseout': 'onMouseOut'
@@ -566,10 +567,14 @@ module.exports = class SpellView extends View
   onChangeEditorConfig: (e) ->
     aceConfig = me.get 'aceConfig'
     @ace.setDisplayIndentGuides aceConfig.indentGuides # default false
-    @ace.setShowInvisibles # default false
+    @ace.setShowInvisibles aceConfig.invisibles # default false
     @ace.setKeyboardHandler @keyBindings[aceConfig.keyBindings ? 'default']
     @aceSession.setMode @editModes[aceConfig.language ? 'javascript']
 
+  onChangeLanguage: (e) ->
+    aceConfig = me.get 'aceConfig'
+    @aceSession.setMode @editModes[aceConfig.language ? 'javascript']
+
   dismiss: ->
     @recompile() if @spell.hasChangedSignificantly @getSource()
 

app/views/play/level/tome/tome_view.coffee

@@ -48,6 +48,7 @@ module.exports = class TomeView extends View
     'tome:spell-loaded': "onSpellLoaded"
     'tome:cast-spell': "onCastSpell"
     'tome:toggle-spell-list': 'onToggleSpellList'
+    'tome:change-language': 'updateLanguageForAllSpells'
     'surface:sprite-selected': 'onSpriteSelected'
     'god:new-world-created': 'onNewWorld'
 
@@ -217,6 +218,9 @@ module.exports = class TomeView extends View
     spell.view.reloadCode false for spellKey, spell of @spells
     Backbone.Mediator.publish 'tome:cast-spells', spells: @spells
 
+  updateLanguageForAllSpells: ->
+    spell.updateLanguageAether for spellKey, spell of @spells
+
   destroy: ->
     spell.destroy() for spellKey, spell of @spells
     @worker?._close()