Hi all, Few days ago I started experimenting with the org.slf4j.cal10n package for generating localized logs using logback. That package easily allow one to obtain localized log messages. Since SLF4J does not support localization of logger names and I need them to be localized too, I made some modification to logback-classic and used CAL10N to internationalize level names. More precisely, I defined an enum type named Levels with the keys TRACE, DEBUG, INFO, WARN and ERROR. I created resource bundles for some locales, e.g. levels_ja.properties for the Japanese locale. I added to the Level class the constructor private Level(int levelInt, Enum<?> key) { this.levelInt = levelInt; IMessageConveyor mc = new MessageConveyor(Locale.getDefault()); this.levelStr = mc.getMessage(key); } Finally, I defined the TRACE, DEBUG, INFO, WARN and ERROR using the above constructor, e.g, for level TRACE public static final Level TRACE = new Level(TRACE_INT, Levels.TRACE); Thanks to this modification I am know able to obtain localized level names in log files. I am wondering if this changes may be useful for other logback users. If you have any suggestion/comment please do not hesitate to respond to this email. Cheers, Dario