Misc config loading fixes

The main motivation behind this is simplicity and correctnes, but the new small config library is also faster:

```
BenchmarkDefaultConfigProvider/Viper-16         	  252418	      4546 ns/op	    2720 B/op	      30 allocs/op
BenchmarkDefaultConfigProvider/Custom-16        	  450756	      2651 ns/op	    1008 B/op	       6 allocs/op
```

Fixes #8633
Fixes #8618
Fixes #8630
Updates #8591
Closes #6680
Closes #5192

1 files changed, 4 insertions, 4 deletions

diff --git a/langs/config.go b/langs/config.go
index 3b1da89ec..fe4ed9d14 100644
--- a/langs/config.go
+++ b/langs/config.go
@@ -43,13 +43,13 @@ func LoadLanguageSettings(cfg config.Provider, oldLangs Languages) (c LanguagesC
 
 	var languages map[string]interface{}
 
-	languagesFromConfig := cfg.GetStringMap("languages")
+	languagesFromConfig := cfg.GetParams("languages")
 	disableLanguages := cfg.GetStringSlice("disableLanguages")
 
 	if len(disableLanguages) == 0 {
 		languages = languagesFromConfig
 	} else {
-		languages = make(map[string]interface{})
+		languages = make(maps.Params)
 		for k, v := range languagesFromConfig {
 			for _, disabled := range disableLanguages {
 				if disabled == defaultLang {
@@ -57,7 +57,7 @@ func LoadLanguageSettings(cfg config.Provider, oldLangs Languages) (c LanguagesC
 				}
 
 				if strings.EqualFold(k, disabled) {
-					v.(map[string]interface{})["disabled"] = true
+					v.(maps.Params)["disabled"] = true
 					break
 				}
 			}
@@ -193,7 +193,7 @@ func toSortedLanguages(cfg config.Provider, l map[string]interface{}) (Languages
 			case "params":
 				m := maps.ToStringMap(v)
 				// Needed for case insensitive fetching of params values
-				maps.ToLower(m)
+				maps.PrepareParams(m)
 				for k, vv := range m {
 					language.SetParam(k, vv)
 				}