Developing a high level language over Zig

Hi everyone I saw zig is and intresting language I am learning it and also making a transpilied High level language over it I want some help with developing syntax. in my lang there are three types of var declaration 1) using local keyword this are added in arena of the specific function. 2) using let keyword this are on stack but i am finding solution to make strings easier here. 3) manual memory but my transpiler will automatically use defer keywords so they are safe and delete once block exit 4) using unsafe direct fully manual memory management but still my transpiler will not let compiler till once in code the are freed.