User Settings: General > Languages
Under Languages, you determine the order of the languages that have been created in Across and which are available for selection. By changing the sort order, you can customize Across, for instance, by having the languages you most frequently use displayed first.
You can change the order of the languages by selecting one or more languages from the list of languages and below the list, click the and icons. The selected languages is then moved up or down by one position. Continue until the languages have reached the desired position. Then you can continue sorting the rest of the languages until the desired sort order has been achieved.
You can also define a sublanguage for every language that will then be used as default in Across. To do this, click the desired language in the Default sublanguage column and select the sublanguage from the drop-down list.