I need to efficiently sort my texts in several languages in the same application. How?

For example, sorting Swedish names in either Swedish or English (accent and case sensitive):

SQL>create table t (names nvarchar(30));
SQL>insert into t values('Arlanda');
SQL>insert into t values('Örebro');
SQL>insert into t values('Oskarshamn');
SQL>insert into t values('Ängelholm');
SQL>insert into t values('Malmö');
SQL>insert into t values('Stockholm');
SQL>insert into t values('Åmål');

SQL>-- You can speed up the sort with indexes!
SQL>create index s on t(names collate swedish_3);
SQL>create index e on t(names collate english_3);

SQL>SELECT names FROM t ORDER BY names COLLATE swedish_3;

NAMES 
===== 
Arlanda
Malmö 
Oskarshamn
Stockholm 
Åmål 
Ängelholm 
Örebro

SQL>SELECT names FROM t ORDER BY names COLLATE english_3;

NAMES 
===== 
Åmål 
Ängelholm 
Arlanda 
Malmö 
Örebro 
Oskarshamn
Stockholm