Psyz

try change charset in database property, in table propery and each columns
 
also probably better set some good charset in mysql.conf or mariadb.conf (depend what sql software you using)
 
If you not sure what charset to set, try utf8mb4 or utf8mb4_general_ci. it should support any languages
 

/** * Loads persistent NPC Barter Data from SQL **/ static void npc_barter_fromsql(void) { struct SqlStmt *stmt = SQL->StmtMalloc(map->mysql_handle); char name[NAME_LENGTH + 1]; int itemid; int amount; int removeId; int removeAmount; if (SQL_ERROR == SQL->StmtPrepare(stmt, "SELECT `name`, `itemId`, `amount`, `priceId`, `priceAmount` FROM `%s`", map->npc_barter_data_db) || SQL_ERROR == SQL->StmtExecute(stmt) ) { SqlStmt_ShowDebug(stmt); SQL->StmtFree(stmt); return; } npc_barter_data_db is
https://github.com/HerculesWS/Hercules/blob/stable/conf/common/inter-server.conf#L120
npc_barter_data_db: "npc_barter_data"  
means you are missing a table name `npc_barter_data`
https://github.com/HerculesWS/Hercules/blob/stable/sql-files/upgrades/2018-12-29--07-51.sql
 
how can you ignore the SQL update file ?