till version 4.2 the way the media module handles localized properties is custom. Since version 4.0 Magnolia directory support i18n through I18NContentSupport, so we will start using it directly from media version 4.2. Note that there is a subtle difference in the way I18NContentSupport and the Media module handled localized properties, since the media module used in the part the "-" separator (property-locale) while the magnolia standard is "_" (property_locale). In the 4.2 release of the media module we are not supporting the old "-" syntax anymore and we are deprecating most of the EL functions used to get localized properties, since we can reuse the standard magnolia support.