5 Pesos Esperanto Congress

(en) Variants: The variation on the obverse, is that two versions of cuban arms were used, one with plain strips on left side of coat, and thin wreath, and the other with reeded strips on coat and thick wreath.


On left variant for KM# 251.1; on right for KM# 251.2.

Esperanto is the most known artificial language, that was created by Dr. Luis Lázaro Zamenhof, Polish ophthalmologist, from end of 1870 decade, till middle 1880's. First grammatical rules (only 16 rules) were published on 1887 at Warshaw.
First Esperanto Congress was held at Boulogne-sur-Mer, France, in 1905, and is celebrated every year (except on gaps owing to WorldsWars), in different cities of the world. 2020 and 2021 versions were virtual, on Internet, owing to sanitary world situation.
1990 Congress was organized at Havana, as 75th. edition.
Esperanto language is based on several modern languages, has no irregular rules, and it structure allows words be constructed using segments to create new words, that can be understood by knowing the structure. Adjectives, sustantives, are created by certain endings to root word, and has no regional variations as common on natural languages. Owing to its simple structure, small amount of root words, and gramatical rules is easy to learn and understand. Same happens on writing, cause alphabet (28 letters) is totally phonetic, does not use similar letters (q, w, x, y, except for foreign names not converted) and adds 6 accented letters for some needed sounds
Some micro nations already have adopted Esperanto as official language (always with the original one), and some cities and regions use it as a second language; i.e. in road signs.