en.wikipedia.org/wiki/Latvia

[ainars]

The sole official language of Latvia is Latvian, which belongs to the
Baltic language sub-group of the Balto-Slavic branch of the
Indo-European language family. Another notable language of Latvia is the
nearly extinct Livonian language of the Finnic branch of the Uralic
language family, which enjoys protection by law; Latgalian – referred to
as either a dialect or a distinct separate language of Latvian – is also
formally protected by Latvian law but only as a historical variation of
the Latvian language. Russian, which was widely spoken during the Soviet
period, is still the most widely used minority language by far (in 2011,
34% spoke it at home, including people who were not ethnically
Russian).[179] While it is now required that all school students learn
Latvian, most schools also include English, Russian and German in their
curricula. English and Russian are also widely accepted in Latvia,
especially in business and tourism. As of 2014 there were 109 schools
for minorities that use Russian as the language of instruction (27% of
all students) for 40% of subjects (the remaining 60% of subjects are
taught in Latvian).

On 18 February 2012, Latvia held a constitutional referendum on whether
to adopt Russian as a second official language.[180] According to the
Central Election Commission, 74.8% voted against, 24.9% voted for and
the voter turnout was 71.1%.[181]

Beginning in 2019, instruction in Russian language will be gradually
discontinued in private colleges and universities in Latvia, as well as
general instruction in Latvian public high schools,[182][183] except for
subjects related to culture and history of the Russian minority, such as
Russian language and literature classes.[184]