A classification of the languages used on labels of the different specimens. EN = English, FR = French, LA = Latin, ET = Estonian, DE = German, NL = Dutch, PT = Portuguese, ES = Spanish, SV = Swedish, RU = Russian, FI = Finnish and IT = Italian. ZZ indicates a single language could not be determined: either there were multiple languages used on the label, there was no obvious use of a certain language (i.e. only scientific Latin terms) or the language was not readily identifiable. Different herbaria are identified by their Index Herbariorum codes (Institution Code in Table 2).