Various input formats are listed below. The final "unreal" test shows what happens for places not on the template's list.

Abbreviation
{{Continent code|NA}}

{{Continent code}}

NANA

{{Continent code/sandbox}}

NANA

Continent name
{{Continent code|North America}}

{{Continent code}}

NANorth America

{{Continent code/sandbox}}

NANorth America

Nation within
{{Continent code|Mexico}}

{{Continent code}}

NAMexico

{{Continent code/sandbox}}

NAMexico

Island nation
{{Continent code|Cuba}}

{{Continent code}}

NACuba

{{Continent code/sandbox}}

NACuba

Lowercase
{{Continent code|na}}

{{Continent code}}

NAna

{{Continent code/sandbox}}

NAna

Initials
{{Continent code|N.A.}}

{{Continent code}}

NAN.A.

{{Continent code/sandbox}}

NAN.A.

Possible word
{{Continent code|AN}}

{{Continent code}}

ANAN

{{Continent code/sandbox}}

ANAN

Unreal
{{Continent code|Wonderland}}

{{Continent code}}

Wonderland

{{Continent code/sandbox}}

Wonderland