Historical clue formulations

• Native language in Oslo — 2023-10-03
• Like Grieg, to Grieg — 2015-01-31
• Scandinavian language, to its speakers — 2014-08-17
• Like Ibsen, to his countrymen — 2008-08-29
• Scandinavian language, to natives — 2006-08-13
• From Oslo, to natives — 1998-07-09