diff --git a/lang/funcs/core/datetime/coredatetime.go b/lang/funcs/core/datetime/datetime.go
similarity index 100%
rename from lang/funcs/core/datetime/coredatetime.go
rename to lang/funcs/core/datetime/datetime.go
diff --git a/lang/funcs/core/example/coreexample.go b/lang/funcs/core/example/example.go
similarity index 100%
rename from lang/funcs/core/example/coreexample.go
rename to lang/funcs/core/example/example.go
diff --git a/lang/funcs/core/fmt/corefmt.go b/lang/funcs/core/fmt/fmt.go
similarity index 100%
rename from lang/funcs/core/fmt/corefmt.go
rename to lang/funcs/core/fmt/fmt.go
diff --git a/lang/funcs/core/math/coremath.go b/lang/funcs/core/math/math.go
similarity index 100%
rename from lang/funcs/core/math/coremath.go
rename to lang/funcs/core/math/math.go
diff --git a/lang/funcs/core/os/coreos.go b/lang/funcs/core/os/os.go
similarity index 100%
rename from lang/funcs/core/os/coreos.go
rename to lang/funcs/core/os/os.go
diff --git a/lang/funcs/core/strings/corestrings.go b/lang/funcs/core/strings/strings.go
similarity index 100%
rename from lang/funcs/core/strings/corestrings.go
rename to lang/funcs/core/strings/strings.go
diff --git a/lang/funcs/core/sys/coresys.go b/lang/funcs/core/sys/sys.go
similarity index 100%
rename from lang/funcs/core/sys/coresys.go
rename to lang/funcs/core/sys/sys.go