The SNP leader admitted the word "national" could be "hugely problematic".
Royal Sing-A-Long In Edinburgh
The Duchess of Cambridge has taken part in a sing-a-long on a visit to an Edinburgh school.
Kate joined hundreds of pupils at St Catherine's Primary for a special assembly where she sang and performed hand actions during a performance to welcome the royal visitor.
The school is one of 28 in Scotland where counsellors from children's mental health charity Place2Be are on hand to support pupils having difficulties.
Charity patron Kate met teachers to discuss the programme after singing along to Welcome Everybody at an assembly where youngsters presented her with a quaich, a Scottish toasting cup.
She told pupils: "I think everybody should start their morning like that. Have a wonderful day.''
Kate, who wore a forest green Max Mara coat and a skirt by Le Kilt, will later join Andy Murray's mother Judy at a tennis workshop in the Scottish capital.
The Duchess is visiting three school-based charity projects linked to causes close to her heart.
Place2Be works in schools in some of the most disadvantaged areas of Glasgow and Edinburgh.
It provides support and therapy to pupils in need, including those who have experienced a family breakdown, bereavement or domestic abuse.
A police watchdog probe was launched after the remains of the 52-year-old were found in a house in Dumfries in February last year.
The accident happened at about 7.50pm on Thursday in Moodiesburn, North Lanarkshire.
More than 70 firefighters were needed to bring the blaze under control at Blochairn Fruit Market in the early hours of Thursday.
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