README and Help - "opaque" -> "opacity"

README.md

@@ -59,7 +59,7 @@ optional arguments:
   -fs SIZE, --fontsize SIZE
                         Default font size [default: 25]
   -a ALPHA, --alpha ALPHA
-                        Text opaque
+                        Text opacity
   -l SECONDS, --lifetime SECONDS
                         Duration of comment display [default: 5]
   -p HEIGHT, --protect HEIGHT

danmaku2ass.py

@@ -735,7 +735,7 @@ def main():
     parser.add_argument('-s', '--size', metavar=_('WIDTHxHEIGHT'), required=True, help=_('Stage size in pixels'))
     parser.add_argument('-fn', '--font', metavar=_('FONT'), help=_('Specify font face [default: %s]') % _('(FONT) sans-serif')[7:], default=_('(FONT) sans-serif')[7:])
     parser.add_argument('-fs', '--fontsize', metavar=_('SIZE'), help=(_('Default font size [default: %s]') % 25), type=float, default=25.0)
-    parser.add_argument('-a', '--alpha', metavar=_('ALPHA'), help=_('Text opaque'), type=float, default=1.0)
+    parser.add_argument('-a', '--alpha', metavar=_('ALPHA'), help=_('Text opacity'), type=float, default=1.0)
     parser.add_argument('-l', '--lifetime', metavar=_('SECONDS'), help=_('Duration of comment display [default: %s]') % 5, type=float, default=5.0)
     parser.add_argument('-p', '--protect', metavar=_('HEIGHT'), help=_('Reserve blank on the bottom of the stage'), type=int, default=0)
     parser.add_argument('-r', '--reduce', action='store_true', help=_('Reduce the amount of comments if stage is full'))

locale/en/LC_MESSAGES/danmaku2ass.po

@@ -68,8 +68,8 @@ msgid "ALPHA"
 msgstr "ALPHA"
 
 #: danmaku2ass.py:738
-msgid "Text opaque"
-msgstr "Text opaque"
+msgid "Text opacity"
+msgstr "Text opacity"
 
 #: danmaku2ass.py:739
 msgid "SECONDS"

locale/ja/LC_MESSAGES/danmaku2ass.po

@@ -68,7 +68,7 @@ msgid "ALPHA"
 msgstr "アルファ"
 
 #: danmaku2ass.py:738
-msgid "Text opaque"
+msgid "Text opacity"
 msgstr "テキストの不透明度"
 
 #: danmaku2ass.py:739

locale/zh_CN/LC_MESSAGES/danmaku2ass.po

@@ -68,7 +68,7 @@ msgid "ALPHA"
 msgstr "ALPHA"
 
 #: danmaku2ass.py:738
-msgid "Text opaque"
+msgid "Text opacity"
 msgstr "文字不透明度"
 
 #: danmaku2ass.py:739

locale/zh_TW/LC_MESSAGES/danmaku2ass.po

@@ -68,7 +68,7 @@ msgid "ALPHA"
 msgstr "ALPHA"
 
 #: danmaku2ass.py:738
-msgid "Text opaque"
+msgid "Text opacity"
 msgstr "文字不透明度"
 
 #: danmaku2ass.py:739