芬兰国歌和爱沙尼亚国歌为什么是相同的？

我支持楼主 两个国歌旋律是一样的 但是 它们都只是国旗歌 即国、旗分歌 世界上有少数国家或地区是这样的（台湾 爱沙尼亚 芬兰） 很有意思的 升旗仪式上 先唱国歌 再升旗（演奏国旗歌） 与大多数国家与众不同吧~呵呵呵

下面做出正面回答：爱沙尼亚国歌《我的土地 我的欢愉》该曲的歌词作者为约翰·沃德玛·杰森（Johann Voldemar Jannsen），弗雷德里克·帕修斯（Fredrik Pacius）为之谱曲，帕修斯也是芬兰国歌《我们的国家》的作曲者。 现在明白了吧 两个国家国歌的作曲者都是同一个人！

以下是爱沙尼亚政府对于国歌的英文官方解释：
The Estonian national anthem "My Native Land..." is a choral-like melody arranged by a Finnish composer of German origin Fredrik Pacius in 1843. In Estonia, Johann Voldemar Jannsen's lyrics were set to this melody and sung at the first Estonian Song Festival in 1869.
也提到了爱沙尼亚国歌是套用芬兰国歌填词而成的

芬兰、爱沙尼亚国歌只是旋律一样，歌词不同。两国文化背景是相似的。
国旗歌是一部分国家升旗时演奏和演唱的歌曲，我国和其他大部分国家不设国旗歌，以国歌为国旗歌。爱沙尼亚好像是有国旗歌的。

这个歌本来是从德国移民到芬兰的Fredrik Pacius写的，后来在爱沙尼亚很流行

Mu isamaa, mu õnn ja rõõm ("My Fatherland, My Happiness and Joy") was adopted as the national anthem (Estonian: (riigi)hümn) of the Republic of Estonia in 1920, and again in 1990.

The lyrics were written by Johann Voldemar Jannsen and are set to a melody composed in 1848 by Fredrik (Friedrich) Pacius which is also that of the national anthem of Finland: Maamme ("Vårt Land" in Swedish).

The song was first presented to the public as a choral work in the Grand Song Festival of Estonia in 1869 and quickly became a symbol of the Estonian National Awakening.

Between 1956 and 1990 the Estonian Soviet Socialist Republic, a part of the Soviet Union, had a different anthem. Although Mu isamaa, mu õnn ja rõõm was banned under Soviet rule, the people of Estonia could often hear the melody, as Finland's state broadcaster YLE, whose radio and television broadcasts were received in Northern Estonia, played the Finnish national anthem at closedown every night. This also has the same melody of the counterpart of Estonia.