Here you can find the functions needed to create new languages in the MentDB engine.
A created language can not be deleted.

admin
language create "en";

mentdb
Language en created with successful.

admin
language show

mentdb
[<br>  "en",<br>  "fr",<br>  "io"<br>]

admin
@[r_fr_?_est_une_langue]

mentdb
RG[b]

admin
graph relation (@[r_fr_?_est_une_langue]);

mentdb
j23i88m90m76i39t04r09y35p14a96y09e57t39{"e":[{"n1":"V0_RG[b]","n2":"T1_TH[]","k":"$V0_RG[b]_T1_TH[]"},{"n1":"T1_TH[]","n2":"T2_TH[2]","k":"$T1_TH[]_T2_TH[2]"},{"n1":"T2_TH[2]","n2":"T3_TH[8]","k":"$T2_TH[2]_T3_TH[8]"},{"n1":"T3_TH[8]","n2":"T4_TH[e]","k":"$T3_TH[8]_T4_TH[e]"},{"n1":"V0_RG[b]","n2":"M5_[RG[b] 1\/3]","k":"$V0_RG[b]_5"},{"n1":"M5_[RG[b] 1\/3]","n2":"M6_[RG[b] 2\/3]","k":"$M5_[RG[b] 1\/3]_6"},{"n1":"M6_[RG[b] 2\/3]","n2":"B7_L","k":"M6_[RG[b] 2\/3]_B7_L"},{"n1":"B7_L","n2":"R8_RL[4x]","k":"B7_L_R8_RL[4x]"},{"n1":"R8_RL[4x]","n2":"R9_RL[4w]","k":"R8_RL[4x]_R9_RL[4w]"},{"n1":"R9_RL[4w]","n2":"R10_RL[4v]","k":"R9_RL[4w]_R10_RL[4v]"},{"n1":"M6_[RG[b] 2\/3]","n2":"M11_[RG[b] 3\/3]","k":"$M6_[RG[b] 2\/3]_11"},{"n1":"M11_[RG[b] 3\/3]","n2":"B12_L","k":"M11_[RG[b] 3\/3]_B12_L"},{"n1":"B12_L","n2":"R13_RL[4x]","k":"B12_L_R13_RL[4x]"},{"n1":"R13_RL[4x]","n2":"R14_RL[4w]","k":"R13_RL[4x]_R14_RL[4w]"},{"n1":"R14_RL[4w]","n2":"R15_RL[4v]","k":"R14_RL[4w]_R15_RL[4v]"}],"n":{"M5_[RG[b] 1\/3]":"1","T4_TH[e]":"TH[e]","R10_RL[4v]":"RL[4v]","M6_[RG[b] 2\/3]":"2","T2_TH[2]":"TH[2]","B12_L":"L","V0_RG[b]":"RG[b]","R14_RL[4w]":"RL[4w]","T1_TH[]":"TH[]","T3_TH[8]":"TH[8]","R8_RL[4x]":"RL[4x]","R13_RL[4x]":"RL[4x]","R9_RL[4w]":"RL[4w]","M11_[RG[b] 3\/3]":"3","R15_RL[4v]":"RL[4v]","B7_L":"L"}}