Many languages of South America are tonal. For example, various analyses of the Pirahã language describe either two or three tones. The Ticuna language isolate is exceptional for having five register tones (the only other languages in the Americas to have such a system are Trique and Usila, mentioned above). Swedish and Norwegian have simple word tone systems, often called pitch accent (although they are actually contour tones), appearing only in words of two or more syllables. Each word has a lexical tone, which varies by dialect. Words whose pronunciation differs only in tone are frequently morphologically or etymologically unrelated and may be spelled differently, as in Norwegian "cider" ('cider'), "sider" ('sides'). The two word tones are conventionally called tone or accent 1 and 2, though also "acute accent" and "grave accent" in Sweden, or "one-syllable" and "two-syllable" accent since this they are usually decided by the number of syllables in the word's lexical form. Tone 2 may also be called the 'compound' or 'double' tone, as both languages tone 2 has a more complex variation in pitch than tone 1. In Norway, there are two major dialectal divisions based on tone, roughly eastern and western/northern, where the tones have different values: in the east, T1 = level low, T2 = falling; in the west/north, T1 = falling, T2 = rising-falling. Danish had the same tonal contrast as Norwegian and Swedish but in standard Danish this has changed into a contrast between "stød", a glottal approximant (which also appears in words of one syllable) that is sometimes phonetically transcribed with ˀ, and "absence of stød". This is not phonetically tones although phonemically it can be analyzed as such. Tones are, however, preserved in a few southern Danish dialects, and stressed syllables with accent 1 and accent 2 (corresponding to "stød" and "absence af stød") may be phonetically transcribed with and , respectively. The IPA once had a dedicated symbol for tone 2 in Nowegian and Swedish, , but that was retired as it did not have an inherent sound value. In Limburgish and Central Franconian dialects, tones can also occur in monosyllabic words: "dáág" ('day'), "dáàg" ('days').